KR20240018195A - A medical needle - Google Patents

Abstract

The present invention relates to a needle used to pull a tube connecting the inside and outside of the body out of the surgical site. When the needle is exposed outside the body, it has a binding groove configured to pull a separate auxiliary device and pull it out of the operator's hand. Includes a grip groove that prevents the needle from slipping or spinning. These medical needles are effective in preventing slipping during use and reducing the risk of medical accidents.

Description

A medical needle {A medical needle}

The present invention relates to a needle used to withdraw a tube connecting the inside and outside of the body out of the surgical site. More specifically, it relates to the structure of a medical needle that is designed to alleviate slippage when the operator works and to facilitate withdrawal out of the body. It's about.

The medical needle of the present invention provides a guide function so that the suction tube can be drawn out through human tissue. A medical aspirator is a device used to expel exudates, such as body fluids and plasma, from the affected area after surgery. A medical aspirator consists of a drainage tube that forms a passage for withdrawing body fluid, and a suction container that is connected to the drainage tube and generates suction force by providing a predetermined negative pressure.

Republic of Korea Patent Registration No. 1346944 discloses an example of a conventional medical aspirator. As disclosed in a prior patent, the drainage tube is drawn out through the affected area with its tip inserted into a medical needle called a trocar, and then used by inserting the injection port of the drainage container at the site where the trocar was removed.

The medical needles currently in use are made of metal and have a smooth surface, so there is a problem of slipping when the operator handles them with hands that have body fluids on them. These problems can cause medical accidents, such as excessively large wounds at the surgical site or organ or nerve damage. In order to withdraw a surgical needle out of the body, the operator must hold the back of the needle with one hand and pull the tip of the needle that has penetrated the outside of the body with the other hand. However, the hand may slip, causing difficulty in surgical work, or the operator may be injured by being pricked by a sharp needle. There is a problem that may result in injury.

Republic of Korea Patent Registration No. 1346944

The present invention aims to solve these problems and propose a structure for a medical needle that can prevent or alleviate slippage during surgical procedures.

Additionally, the purpose of the present invention is to propose a structure for a medical needle that makes it easy for a practitioner to hold the needle and apply force in a desired direction.

Additionally, the purpose of the present invention is to propose a structure that can withdraw a needle using a separate auxiliary tool.

The medical needle according to the present invention for achieving the above-mentioned purpose is a medical needle in which an aspirator tube is connected to the rear end and a sharp needle is formed at the front end to penetrate human tissue, and the needles are arranged at a predetermined distance apart. A first groove and a second groove having different shapes are formed, and the first groove is located at the rear of the needle so that it can be easily caught and pulled by an auxiliary device while the front end of the needle is exposed through the human tissue. Located in , the first groove has the same cross-sectional shape along the circumferential circumference of the cylindrical needle body, and the second groove is formed in the first groove to apply a force that pushes the needle from inside the human tissue to the outside. Located at the rear of the groove, the second groove has a shape including a bottom surface orthogonal to the radial reflection of the needle body.

In addition, the needle includes a bending portion bent so that the central axes of the front portion and the rear portion form a predetermined angle, the first groove and the second groove are located on opposite sides with respect to the bending portion, and the bottom of the second groove is The normal direction toward which the surface faces is the same as the bending direction of the front part of the needle.

Additionally, the cross-sectional shape of the first groove may have an arc shape, the depth of the first groove may be less than 1/2 of the radius of the needle, and the depth of the second groove may also be less than 1/2 of the radius of the needle.

In addition, the length of the bottom surface of the second groove is 1.5 centimeters or more,

The distance from the front end of the needle to the first groove is 3 centimeters or less, the separation distance between the first groove and the second groove is 5 centimeters or more, and the length from the second groove to the rear end of the needle is 5 centimeters. It could be more than that.

In addition, the needle includes a tube insertion portion to which a medical tube is coupled, the tube insertion portion includes a plurality of locking protrusions that support the inner peripheral surface of the tube to which the medical tube is coupled, and the locking protrusion portion has a shape whose radius decreases from the front to the back. You can have

Another medical needle according to the present invention for achieving the above-described object is a medical needle that penetrates the human body through the front end and withdraws the tube out of the body with an aspirator tube connected to the rear end, the front end of the needle having In order to engage the auxiliary device that pulls the needle, a binding groove having an arc-shaped cross section may be formed along the circumferential circumference of the needle body.

Another medical needle according to the present invention for achieving the above-described object is a medical needle that penetrates the human body through the front end with an aspirator tube connected to the rear end and withdraws the tube out of the body, wherein the needle is divided into the front and rear ends. The portion includes a bending portion to form a predetermined angle, and a grip groove including a bottom surface having a predetermined depth is formed at the rear portion to apply a force that pushes the needle outward, and the bottom surface of the grip groove faces. The direction may be the same as the direction in which the front part is bent.

Additionally, the needle may have a left-right symmetrical shape.

The medical needle according to the present invention has two or more grooves for different purposes, providing convenience in use.

The binding groove, which is one groove, is configured so that a separate auxiliary device can be used to pull the needle when it is exposed outside the body, preventing accidents where the operator's hand is stabbed and slipping during the withdrawal operation. Another groove, the grip groove, prevents the needle from slipping or spinning in the operator's hand, and also reduces the risk of unexpected medical accidents by allowing the user to check the bending direction of the front part and the position of the needle by touch. You can.

In addition, the needle according to the present invention has a left-right symmetrical structure, so it has the advantage of being able to be used in the same way regardless of whether the user uses it with his or her left or right hand.

Figure 1 is a perspective view showing an example of a medical needle according to a first embodiment of the present invention.
Figure 2 is a front view of the medical needle shown in Figure 1.
Figure 3 is a cross-sectional view taken along line III-III' of Figure 2.
Figure 4 is a top view of the medical needle shown in Figure 1.
Figure 5 is a perspective view showing a tube withdrawal mechanism containing a medical needle according to a second embodiment of the present invention.
Figure 6 is a cross-sectional view of the needle of the tube extraction device shown in Figure 5 taken along line A-A'.
Figure 7 is a cross-sectional view taken along line B-B' in Figure 5.
Figure 8 is a cross-sectional view taken along line C-C' in Figure 5.
Figures 9 and 10 are enlarged cross-sectional views showing the binding mechanism portion of the tube extraction mechanism holder according to the second embodiment of the present invention.
Figure 11 is an exploded perspective view showing the binding mechanism portion of the tube extraction mechanism holder according to the second embodiment of the present invention.
Figure 12 is a cross-sectional view taken along line D-D' in Figure 11.
Figure 13 is a perspective view showing a needle of a tube withdrawal device according to another embodiment of the present invention.
Figure 14 is a cross-sectional view showing the main portion of the holder of the tube extraction mechanism according to another embodiment of the present invention.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the drawings. Various modifications may be made to the embodiments described below by those skilled in the art to which the present invention pertains. The embodiments described below are not intended to limit the present invention to the embodiments. It should be understood that the present invention includes various modifications, substitutions, and equivalents within the scope of the technical idea understood from the following embodiments as well as the entire specification.

Expressions such as “comprises,” “consists of,” and “has,” which may be used below, should be understood as not excluding additional components or functions.

“First…” may be used hereinafter. ”, “Second... Expressions such as ”, “first”, “second”, etc. should not be construed as limiting the order or importance between components unless explicitly stated.

Expressions such as “combined” and “connected” that may be used below should be understood not only in cases where they are directly combined or connected, but also that other components may exist or be interposed in the middle, unless explicitly stated. do.

In the use of terms below, singular expressions should be understood as not excluding plural expressions unless explicitly stated.

In the following description, a spatial coordinate system may be set and explained for convenience. The coordinate system used in the explanation is only for the purpose of relatively explaining the position of the object and does not mean absolute directionality. The coordinate system used may be a rectangular coordinate system, a cylindrical coordinate system, a spherical coordinate system, etc., and may be selectively used as needed. Additionally, in the following description, for convenience, directions such as front, back, left, right, up, down, etc. may be set and described to explain the relative positions between objects.

The present invention is characterized by forming one or more grooves on the surface of the needle to prevent the needle from slipping during surgery and to enable the operator to easily handle the needle. During the surgical process, the needle can be stably supported by holding this groove with the hand or moving it using a separate auxiliary device. Hereinafter, various embodiments of the medical needle according to the present invention will be described in detail with reference to the drawings.

<First embodiment>

1 to 4 show a medical needle 1 according to a first embodiment of the present invention. As shown, the medical needle 1 has a predetermined diameter D1 and a length L1, and has a front portion bent at a predetermined angle. Typically, the diameter (D1) of the needle (1) is in the range of 3 to 5 mm (millimeter), and the length (L1) is in the range of 10 to 20 cm (centimeter). The needle 1 can be divided into a front part 1A located in the front and a rear part 1B located in the back based on the bending part 12, which is a bent part. The angle A1 formed by the front part 1A with respect to the rear part 1B may be in the range of 20 to 30 degrees. The diameter (D1), length (L1), and bending angle (A1) of the needle (1) may vary depending on the type of surgery, conditions of use, etc.

A sharp needle 13 is formed at the front end of the needle 1. The needle 13 is formed in such a way that both sides of the front end of the needle 1 are cut to form symmetrical slopes. A tube insertion portion 11 to which the suction tube 3 is connected is formed at the rear end of the needle 1. The aspirator tube (3) is made of a transparent or translucent plastic material, has a certain elasticity, and is coupled to the tube fitting portion (11) in an interference fit manner. The tube fitting portion 11 forms a multi-stage locking protrusion on the outer peripheral surface to provide friction so that the tube 3 does not fall out easily. In this embodiment, the plurality of locking protrusions are formed in a repetitive manner in which the radius decreases from the front to the back, but the shape may vary depending on need.

At the rear of the needle 13, a binding groove 14 is formed by being concavely indented along the outer peripheral surface of the needle 1. The binding groove 14 is used to hook and pull a separate auxiliary device, etc. while the front portion 1A of the needle 1 is exposed through the human tissue T (see Figure 2). Medical forceps may be used as these auxiliary devices, or dedicated holders, which will be described in embodiments described later, may be used. The binding groove 14 has the same cross-sectional shape along the circumferential circumference of the needle 1. In this embodiment, the binding groove 14 has an arc-shaped cross-section, but the cross-sectional shape may vary as needed. Since the binding groove 14 has the same cross-sectional shape around the needle 1, the auxiliary device can be easily fastened in any direction of 360°. The binding groove (1) provides the function of holding and moving the needle (1) through a separate auxiliary device. Accordingly, the user can handle the needle 1 more comfortably and the risk of being stabbed by the needle 13 is reduced.

A gripping groove 15 having a predetermined length is formed in the center of the rear end 1B of the needle 1. The grip groove 15 is formed by cutting the surface of the needle 1 at a predetermined depth, and provides a flat bottom surface 15a of a predetermined length. The bottom surface 15a serves as a support surface that can be supported by pressing with the user's thumb when holding the needle 1. The grip groove 15 serves to prevent the needle 1 from slipping and rotating in the operator's hand. The bottom surface 15a of the grip groove 15 has a direction perpendicular to the radial direction of the needle body, and the direction toward which the bottom surface 15a faces coincides with the direction in which the front portion 1A of the needle 1 is bent. . As shown in Figure 3, the bottom surface 15a is perpendicular to the radial direction R based on the central axis O of the needle 1. Additionally, the normal direction N, which is the direction the bottom surface 15a faces, and the direction in which the front portion 1A of the needle 1 is bent are the same. Under this structure, the operator can check the direction of the grip groove 15 with the sense of touch even when the position of the needle 1 cannot be seen with the eye, thereby determining the direction in which the needle 13 is facing and the approximate direction of the needle 13. Location can be recognized. The location and formation direction of the grip groove 15 reflect ergonomic design that takes the operator's convenience of use into consideration. The gripping groove 15 has a predetermined length along the longitudinal direction of the needle 1. The bottom surface (15a) preferably has a length sufficient to support an adult's thumb so that the practitioner can sufficiently transmit support force through the bottom surface (15a). More specifically, the length L15 of the bottom surface 15a is preferably 1.5 cm (centimeter) or more.

When the operator holds the needle (1), he or she presses the grip groove (15) with the thumb and holds the rear portion of the grip groove (15) with the remaining four fingers. In order for the operator to hold the needle (1) stably, the length (L1c) from the center of the grip groove (15) to the rear end of the needle (1) (hereinafter referred to as “grip part length”, and the corresponding part is called “grip part”) ) is preferably long enough. If the grip length (L1c) is short, it is difficult to transmit sufficient force to the needle (1). Therefore, it is preferable that the grip length (L1c) is 5 cm (centimeter) or more. The gripping groove (15) must be located in the central part of the rear end (1B). If the grip groove (15) is located in front of the rear end (1B), a problem occurs where the separation distance (L1b) from the binding groove (14) becomes too short, and the grip groove (15) is located at the rear of the rear end (1B). If located, a problem occurs in which the above-mentioned grip length (L1c) becomes too short. The separation distance (L1b) between the gripping groove (15) and the binding groove (14) refers to the distance between the central portions of each groove (15, 14). With the needle 1 penetrating the human body, the operator holds the grip with one hand and hangs the auxiliary device on the binding groove 14 with the other hand. To enable this operation, a sufficient separation distance (L1b) must be secured. For this purpose, it is preferable that the separation distance (L1b) is 5 cm (centimeter) or more.

In order to sufficiently secure the separation distance (L1b), it is desirable that the distance (L1a) from the front end of the needle (1) to the center of the binding groove (14) be relatively short. That is, the binding groove 14 is preferably disposed adjacent to the rear of the needle 13. More specifically, the distance L1a from the front end of the needle 1 to the center of the binding groove 14 is preferably 3 cm (centimeter) or less.

Since the binding groove 14 and the gripping groove 15 described above are formed by cutting the corresponding portion, the strength of the portion may be weakened. The depth (E14, E15) of each groove (14, 15) (see Figure 2) should not be excessive, and preferably should be less than 1/2 of the radius (R1) of the needle (1).

The needle 1 according to the present invention has a binding groove 14 and a grip groove 15 formed on the outer peripheral surface to prevent slipping, making it easy for the operator to operate. In addition, as shown in Figure 4, the needle 1 according to the present invention is formed in a left-right symmetrical structure, providing the advantage of being able to operate it in the same way regardless of whether the operator holds it with the left or right hand.

<Second Embodiment>

Hereinafter, the medical needle 1 according to the second embodiment of the present invention and the dedicated holder 2, which is an auxiliary device used when withdrawing the medical needle 1, will be described with reference to FIGS. 5 to 14. Below, the medical needle (1) and holder (2) are collectively referred to as “aspirator tube withdrawal device.”

As shown in Figure 5, the tube withdrawal mechanism includes a needle 1 to which the tube 3 is coupled and a holder 2 coupled to the distal end of the needle 1. Since the medical needle 1 has the same structure as that in the first embodiment described above, detailed description of overlapping parts will be omitted.

The tip of the needle 1 forms a sharp needle 13, and a binding groove 14 used for binding to the holder 2 is formed at the rear of the needle 13. The binding groove 14 is formed at a predetermined depth along the circumference of the cylindrical surface. The binding groove 14 has a circular arc cross-sectional shape with the same radius of curvature as the locking ball 240, which will be described later. The holder (2) is coupled to the needle (1) exposed through the body and is used to assist in easily withdrawing the needle (1). The needle 1 is coupled to the holder 2 through the binding groove 14 formed in the front portion 1A. A binding mechanism 200 for binding the needle 1 is provided at the front of the holder 2. The needle 1 is bound with a portion of the front portion 1A, including the needle portion 13, inserted into the holder 2. The binding mechanism unit 200 that secures the binding groove 14 will be described in more detail below.

The operator performs the binding operation by holding the needle (1) with one hand and manipulating the holder (2) with the other hand. In this embodiment, the holder 2 is shaped like a round bar that is long in one direction, and has a concave middle portion to prevent slipping. In addition, although not shown, the surface of the holder 2 may be curved to make it easier for the user to hold it, or may form a tee (“T” shape) with the rear end open on both sides to make it easier to pull, or may have various other shapes. .

As shown in Figure 7, a needle groove 21 is formed inside the holder 2 along the central axis. The needle groove 21 is formed from the front end of the holder 2 to a predetermined length. The length La of the needle groove 21 should be at least long enough to accommodate the binding groove 14 of the needle 1, and preferably should be long enough to accommodate the entire front portion 1A. . The diameter of the needle groove 21 may be the same as the diameter of the needle 1 or may include a predetermined gap.

Next, the binding mechanism unit 200 will be described in detail with reference to FIGS. 8 to 12. The binding mechanism unit 200 serves to physically bind the needle 1. The binding mechanism unit 200 includes a push cover 210 installed to be able to move forward and backward, a spring 220 built inside the push cover 210, a stopper ring 230 that prevents the push cover 210 from coming off, and a binding mechanism. It includes a locking ball 240 that locks the groove 14 and a cylinder part 250 in which they are installed.

The cylinder portion 250 protrudes toward the front of the holder 2 and has a cylindrical circumference. A ball insertion hole 251 penetrating in the radial direction is formed in the cylinder portion 250. The locking ball 240 is movably installed in the ball insertion hole 251. The spring 220 is made of a cylindrical compression coil spring and is installed around the cylinder portion 250. A push cover 210 is installed around the outside of the spring 220. The push cover 210 is installed on the inside by being caught by a spring 220 and receiving a forward force. The stopper ring 230 supports the spring 220 and the push cover 210 to prevent them from falling forward.

The cylinder portion 250 includes a spring mounting portion 252 on which the spring 220 is installed. A spring support portion 253 is formed at the rear of the spring holder 252 to support the rear end of the spring 220. The spring 220 is installed to be compressed or extensible on the spring holder 252. For this purpose, the outer diameter of the spring mounting portion 252 is preferably smaller than the inner diameter of the spring 220. The spring support portion 253 has a shape that is more radially expanded than the spring mounting portion 252. A stopper ring installation groove 254 that is recessed in the radial direction is formed in front of the spring mounting portion 252. The stopper ring 230 is made of a metal ring with a portion cut out (see FIG. 11), and is inserted into the stopper ring installation groove 254 to support the push cover 210 and the spring 220 in a fixed state.

The binding mechanism unit 200 is made by inserting the locking ball 240 into the ball insertion hole 251 and sequentially inserting the spring 220, push cover 210, and stopper ring 230 into the cylinder unit 250. It is assembled. To prevent the locking ball 240 from coming off radially inward, a locking protrusion 251a is formed inside the ball insertion hole 251 (see FIGS. 8 and 12). When the locking ball 240 is supported on the locking shoulder portion 251a, it is located at the innermost position in the radial direction of the cylinder portion 250. At this time, an inner part of the locking ball 240 protrudes into the needle groove 21 (see Figure 9). This protruding portion is inserted into the binding groove 14 of the needle 1 and acts to prevent the needle 1 from falling out. The binding groove 14 has the same radius of curvature and is in close contact with the locking ball 240.

The push cover 210 is installed to surround the outer circumference of the spring 220, and is used to compress the spring 220 rearward when necessary. As shown in Figure 9, the spring 220 is installed in a state that is wound around the spring holder 252 several times. The rear end of the spring 220 is supported by the spring supporter 253, and the front end is supported by the stopper ring 230 to maintain a predetermined compression state. As shown, the spring 220 supports the outside of the locking ball 240 by being wound around the outer opening of the ball insertion hole 251. The position of the spring 220 wound around the spring mount 252 and the position state of the spring 220 supporting the outside of the locking ball 240 as the spacing (pitch) of the coils constituting the spring 220 changes. may also vary.

The binding mechanism unit 200 can bind or release the needle 1 depending on the position of the locking ball 240. When the locking ball 240 approaches the central axis of the holder 2 and partially enters the needle groove 21, the locking ball 240 prevents the needle 1 from moving within the needle groove 21. It acts as a blocker. As shown in Figure 9, when the needle 1 enters the needle groove 21 and the locking ball 240 enters the binding groove 14, the needle 1 is bound to the holder 2. It won't fall out. Hereinafter, the position where a portion of the locking ball 240 enters the inside of the needle groove 21 and occupies space is referred to as the “binding position,” and the state in which the locking ball 240 is restrained at the “binding position” is referred to as the “binding position.” It is called “state.” Conversely, the position where the locking ball 240 is outside the needle groove 21 without blocking it is called the “release position,” and the locking ball 240 is not restricted to the “binding position” and can be switched to the “release position.” The state in which it is possible is called the “released state.” When the locking ball 240 is in the release position, the needle 1 and the holder 2 are released from binding, and the needle 1 can be freely moved inside the needle groove 21. Figure 10 shows a cross-section of the binding mechanism portion 200 in an unlocked state. As shown, when the locking ball 240 is located outside the needle groove 21 (dotted line position), the needle 1 can be freely moved inside the needle groove 21. The user can change the binding state to the released state by manipulating the push cover 210. When the push cover 210 is moved rearward, the spring 220 hanging on the inside of the push cover 210 is compressed rearward. The spring 220 that supported the outside of the locking ball 240 is removed and the locking ball 240 can move outward. That is, the locking ball 240 is in a released state.

Depending on the position of the push cover 210, the engaged state and released state may be switched. As shown in Figure 9, when the push cover 210 is positioned in the front, it is in a locked state, and as shown in Figure 10, when the push cover 210 is positioned in the rear, it is in a released state.

The push cover 210 has a cylindrical shape surrounding the cylinder portion 250. Knurling may be formed on the outer surface of the push cover 210 to prevent slipping, and the front end may be chamfered. A predetermined space is formed between the inner surface of the push cover 210 and the cylinder portion 250. A band portion 212 with a narrowing radius is formed on the inner surface of the push cover 210. For convenience, the push cover 210 can be divided into an inlet portion 211, which is located in front of the band portion 212, and a cover portion 213, which is a portion located behind the band portion 212. The band portion 212 includes a support surface portion 212b facing the central axis O, a front jaw portion 212a formed by a step between the support surface portion 212b and the inlet portion 212, and a support surface portion 212b. and a rear jaw portion 212c formed by a step between the cover portions 213.

In the assembled state, the push cover 210 maintains its position in the front due to the restoring force of the spring 220. The push cover 210 is caught by the stopper ring 230 and does not move forward. That is, the front jaw portion 212a has a structure that is caught by the stopper ring 230. For this purpose, the distance (Gb) from the needle groove 21 to the outermost corner of the stopper ring 230 in the radial direction must be greater than the distance (Ga) from the needle groove 21 to the support surface portion 212b.

The support surface portion 212b supports the outer surface of the spring 220. The support surface portion 212b acts to push the spring 220 a predetermined distance in the radial direction. Accordingly, the radius of the portion of the spring 220 placed inside the support surface portion 212b is reduced by a predetermined amount. The support surface portion 212b restrains the locking ball 240 to maintain the locked state. As shown in Figure 9, the support surface portion 212b supports the locking ball 240 from moving outward with the spring 220 wire interposed therebetween. In order for at least one spring 220 wire to be configured to support the outside of the locking ball 240, the wire pitch length (P) in the bound state must be smaller than the diameter length (D) of the locking ball 240. In some cases, the spring 220 wire may be located differently from the position shown in FIG. 9 or may be arranged so that the support surface portion 212b directly contacts the locking ball 240. In this case as well, in order to maintain the binding state, the radial distance Ga from the needle groove 21 to the support surface portion 212b must be smaller than the diameter length D of the locking ball 240. In addition, in order for the support surface portion 212b to support the outermost portion of the locking ball 240, the axial length (Lb) of the support surface portion 212b is the horizontal distance from the stopper ring 230 to the center of the locking ball 240. It is preferable to be larger than (Lc).

The push cover 210 is located in the front and maintains the bound state when there is no external force. If it is necessary to release the bound state, the push cover 210 can be switched to the released state by moving rearward as shown in Figure 10. there is. When the push cover 210 moves, the spring 220 is also compressed rearward. A portion of the spring 220 is caught and compressed by the rear jaw portion 212c. As shown, when the push cover 210 moves rearward, the spring 220 and the support surface portion 212b that restrain the locking ball 240 also move, and the locking ball 240 can move outward in the radial direction. It becomes. In other words, the locking ball 240 is switched to the unlocked state. Meanwhile, in the unlocked state, the push cover 210 has its entrance portion 211 formed around the ball insertion hole 251 to prevent the locking ball 240 from coming out. It is desirable to arrange it so as to surround it. In order to secure a space for the locking ball 240 to completely escape from the needle groove 21, the radial distance (Gc) from the needle groove 21 to the inner surface of the inlet 211 is the length of the diameter of the locking ball 240. (D) It must be greater than. As shown in Figure 10, when the locking ball 240 is moved to the release position (dotted line position), the front ends of the push cover 210 and the spring 220 are caught by the locking ball 240 to maintain the compressed state. I do it. That is, the axial movement of the push cover 210 is limited.

Below, the operation of the tube extraction device according to the present invention described above and its use during surgery will be described.

The holder (2) of the tube withdrawal device according to the present invention is used to stably withdraw the needle (2) exposed to the outside of the body during a surgical procedure without slipping. As described above, the holder 2 can be switched between a fastened state and a released state depending on the front and rear positions of the push cover 210. In a state where no external force is applied, the push cover 210 is positioned in the front and is in a locked state. In the bound state, the needle (1) cannot enter the needle groove (21) because the locking ball (240) blocks it. When the user pulls the push cover 210 backward using the thumb or the like of the hand holding the holder 2, the state is switched to the released state, and the needle 1 can be deeply received inside the needle groove 21. As shown in Figure 10, the needle 1 can be received with the binding groove 14 deeper than the position of the locking ball 240. At this time, the needle 1 is in a state of supporting the locking ball 240 outside the needle groove 21, so that forward movement is restricted even if the user does not pull the push cover 210. When the user slowly pulls the holder 2 backward again, the axial positions of the locking ball 240 and the binding groove 14 match, and the locking ball 240 is pushed by the force of the spring 220 into the binding groove 14. It gets caught. As the locking ball 240 moves inward, interference with the spring 220 is released, and the holder 2 is converted to a bound state as shown in FIG. 9. With the needle (1) bound to the holder (2), the user can easily withdraw the needle (1) by pulling the holder (2) instead of the needle (1).

As long as a separate force is not applied to the push cover 210 to move it, the binding state is maintained, and the user can stably proceed with the withdrawal operation.

In the present invention, in order for the needle 1 and the holder 2 to be bound together, the user is not required to precisely arrange the relative positions between the two. Once the needle (1) is inserted into the needle groove (21), if the relative position between the needle (1) and the holder (2) is gradually changed, the locking ball (240) and the binding groove (14) coincide with each other. The locking ball 240 is automatically fastened to the binding groove 14. This occurs due to the force of the spring 220 pushing the locking ball 240 inward. When the locking ball 240 is fastened to the binding groove 14, the user can feel a 'click' sensation. In other words, the transition to the bound state can be perceived through the sense of touch, and the user can quickly respond to this and proceed with the procedure.

The tube withdrawal mechanism according to the present invention may include various modifications different from the embodiments described above. As an example, the needle 1 of the tube withdrawal device according to the present invention may include two or more binding grooves 14. 13 shows a needle 1 having two binding grooves 14A and 14B. The two binding grooves 14A and 14B are formed at a predetermined distance apart. The user can use the holder by binding it to the binding grooves (14A, 14B) at convenient locations as needed. As another example, the holder 2 of the tube extraction mechanism according to the present invention may include two or more locking balls 240. Figure 14 shows a holder 2 having two locking balls 240A and 240B. The locking balls (240A, 240B) can act to stably bind at two points around the binding groove (14) of the needle. The suction tube withdrawal device according to the present invention includes a holder that can be used when withdrawing the needle, allowing the operation to be performed easily and conveniently.

The medical needle according to the present invention described above is provided with two or more grooves for different purposes, providing convenience in use. The binding groove, which is one groove, is configured so that a separate auxiliary device can be used to pull the needle when it is exposed outside the human body, preventing accidents where the operator's hand is stabbed and slipping during the withdrawal operation. Another groove, the grip groove, prevents the needle from slipping or spinning in the operator's hand, and also reduces the risk of medical accidents by allowing the user to check the bending direction of the front part and the position of the needle by touch. In addition, the needle according to the present invention has a left-right symmetrical structure, so it has the advantage of being able to be used in the same way regardless of whether the user uses it with his or her left or right hand.

1: Needle 2: Holder
11: tube insertion part 12: bending part
13: Needle 14: Binding groove
15: gripping groove 21: needle groove
200: Binding mechanism 210: Push cover
211: entrance part 212: band part
213: cover part 220: spring
230: Stopper ring 240: Rocking ball
250: Cylinder part 251: Ball insertion hole
252: Spring holder 253: Spring supporter
254: Stopper ring installation groove

Claims (8)

A medical needle with an aspirator tube connected to the rear end and a sharp needle formed at the front end to penetrate human tissue,
The needle is disposed at a predetermined distance apart and is formed with a first groove and a second groove having different shapes,
The first groove is located at the rear of the needle so that it can be easily pulled by an auxiliary device while the front end of the needle penetrates the human tissue and is exposed, and the first groove is located along the circumferential circumference of the cylindrical needle body. It has the same cross-sectional shape along,
The second groove is located behind the first groove to apply a force that pushes the needle from inside the human tissue to the outside, and the second groove has a shape including a bottom surface orthogonal to the radial reflection of the needle body. Having a medical needle. According to paragraph 1,
The needle includes a bending portion bent so that the central axes of the front portion and the rear portion form a predetermined angle,
The first groove and the second groove are located on opposite sides of the bending portion,
A medical needle in which the normal direction of the bottom of the second groove is the same as the bending direction of the front part of the needle. According to paragraph 1,
The cross-sectional shape of the first groove has an arc shape, and the depth of the first groove is less than 1/2 of the radius of the needle,
A medical needle in which the depth of the second groove is less than 1/2 of the needle radius. According to paragraph 3,
The length of the bottom surface of the second groove is 1.5 centimeters or more,
The distance from the front end of the needle to the first groove is 3 centimeters or less, the separation distance between the first groove and the second groove is 5 centimeters or more, and the length from the second groove to the rear end of the needle is 5 centimeters. A medical needle. According to paragraph 1,
The needle includes a tube insertion portion to which a medical tube is coupled,
The tube fitting portion includes a plurality of locking protrusions that support the inner peripheral surface of the tube to be coupled,
A medical needle in which the locking jaw portion has a shape whose radius becomes smaller from front to back. A medical needle that penetrates the human body through the front end and withdraws the tube out of the body, with an aspirator tube connected to the rear end, comprising:
A medical needle in which a binding groove having an arc-shaped cross-section is formed along the circumferential circumference of the needle body in order to engage an auxiliary device that pulls the needle on the front part of the needle. In the medical needle, which penetrates the human body through the front end with an aspirator tube connected to the rear end and withdraws the tube out of the body,
The needle includes a bending portion such that the front portion and the rear portion form a predetermined angle,
A gripping groove including a bottom surface having a predetermined depth is formed in the rear portion to apply a force that pushes the needle outward,
A medical needle in which the direction in which the bottom surface of the grip groove faces is the same as the direction in which the front part is bent. In the medical needle of any one of claims 1 to 7,
The needle is a medical needle having a left-right symmetrical shape.

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